…for custom blocks.
All unknown blocks are now assumed to carry data, and so this will also future proof WorldEdit (for the immediate future). However, be aware that full custom block support requires carrying TileEntity data (and perhaps other data) and that is not yet supported.

- Changed up EditSession.replaceBlocks to make BaseBlock.inIterable unnecessary.
- Returned BaseBlock.inIterable to its old state and deprecated it.
- Renamed the old BaseBlock.equals to equalsFuzzy, changed the parameter type and took the casts and type checks out.
- Made a new BaseBlock.equals that is consistent with the rules java prescribes.

…access in BlockType and ItemType"
This reverts commit 410ac65.
This has been causing compatibility issues with Spout. I haven't been ble to reproduce, but until somebody figures out why, this gets to go